Readjustable chair

ABSTRACT

Readjustable chair of the kind where a seat and a back are hinge connected to each other, and are supported on a leg subframe work such that the mutual angular position of the seat and back may be altered. Two rigidly fixed supports are provided on each side of the chair, raising from the leg subframe work, and which can carry arm rests. The back of the chair is pivoted to the back support. The seat is fixed to the other support by a pair of slidable and fixable slide shoes.

United States Patent 1 1 14 1 Nov. 20, 1973 Ekornes READJUSTABLE CHAIR3,337,266 8/1967 Burns 297 342 x I3 27 9 4 [76] Inventor: JosteinEkornes,6222 Ikornes, 6/1 6 oven 297/422 X Norway FOREIGN PATENTS ORAPPLICATIONS Filed Oct 28 1971 154,892 l/1954 Australia 297/320 [21]Appl. No.: 193,430 Primary Examiner-Francis K. Zugel Attorney-Nolte etal. [30] Foreign Application Priority Data Oct. 29, 1970 Norway 4125/70[57] ABSTRACT Read ustable chair of the kmd where a seat and a back 52us. c1. 297/320 297/342 are hinge each her, and s"Ppmed I 51 1 int Cl. lr U032 on a leg subframe work such that the mutual angular 58 Fieldo1a;;i..I.II..........II..I 257/542 320 317 the and back my be altered-297/343 5 idly fixed supports are provided on each side of the chair,raising from the leg subframe work, and which The back of the chair ispivoted [56] References Cited can carry arm rests to the back support.The seat 1s fixed to the other sup- UNITED STATES PATENTS port by a pairof slidable and fixable slide shoes. 2,400,588 5/1946 McArthur 297/320 X809,944 I/l906 I-Iunger 297 342 3 Claims, 2 Drawing F lgul'es 2,617,47111/1952 Lorenz 297/342 X where the back is mounted pivotally on to therear of the said supports.

A series of types of such chairs are previously known, where the backand seat are suspended on the frame work or supported by this in such away that the two said main parts may be brought to adopt the preferredmutual angular position.

' To obtain this plus the fixing in a wanted position, it has beenproposed different mechanical means, springs for balancing of forces andweights etc. Such previous constructions have, in other words, beenrelatively complicated and thus expensive to manufacture. Suchconstructions have also often been'liable to the essential disadvantage,that the placing of the construction parts has made possible wedging anddamage to the fingers during readjustment of the chair.

The invention aims at providing a readjustable chair of unusual simpleconstruction which is easy to adjust and by its way of construction doesnot contain any details which make wedging' possible.

According to the invention, it is proposed that a chair according to theprevious mentioned, is designed such that the seat by slidable andfixable slide shoes along the frontmost of the said supports, may befixed to these supports.

For better understanding of the invention, it will be further describedin the following with a reference to the two embodyments which are shownshematically on the drawings.

FIG. 1 shows an initial embodyment of a chair according to theinvention, in an almost stretched position respectively in a positionwith a rected back.

'FIG. 2 shows a somewhat modified version in' the same two positions asmentioned in FIG. 1.

In FIG. 1, 1 indicates the frame upon which the cushion for the backrests and 2 the frame upon which the cushion for the seat rests. Thecushion may, if desired, be designed as one cushion or be detachable,separate cushions. The two frames 1 and 2 are hinge connected to eachother by trunnions 3 and may thus adopt varying angular positions withregard to each other.

Upright supports 4a, 4b, which at the upper end pass into arm rests 4c,are arranged on each side from a suitable leg subframe work, in theshown case a base plate 8 an upright column 7 from the said base plate.Additional arm rest cushions or similar may be fixed to the part 40, ifdesired.

Lower part of the frame for the back is pivotally suspended to the rear,tilted upright supports 4b, as shown b 5.

The frame 2 for the seat is connected to the front,

tilted upward running supports 4a by means of movable slide shoesaquipped with a lock wheel or similar. This detail is indicated by 6.

As will be understood, the movable parts of the chair may swing aboutthe suspension 5, as the slide shoes 6 then slide along the tilted,upward going supports 4a. When the chair is brought into the wantedposition, the wheel for the slide shoe is taken up, and the chair isthen secured in the required position. As will be seen, a minimum ofconstructive details has been used, and movement with fixing is obtainedby simple and safe means which can be manufactured at low cost.

In FIG. 1, the slide shoe with attached fixing lock wheel will movealong the tilted supports 4a and consequently have variable distancefrom the arm rest 40. The chair may be arranged as indicated in FIG. 2,if it is preferred that this distance does not vary, which may bepractical since the arms usually rest more or less against the arm rests4c. 6a indicates a moveable slide shoe, while 6b indicates a stationaryslide shoe equipped with a lock wheel, since it here is provided a guideby means of a tube 9 fixed to the upper slide shoe By the readjustablechair described above, one may easily control the position of the chair,i.e., the mutual position between the back and seat, only just bysuitable weight transfer of the body, and fixing in the wanted positionis done by the described easy means. All readjustments may thus be donewhile one sits in the chair, and no details exist which may initiatewedging of fingers, clothes and similar. The construction is simple, andno disfiguring parts are present.

I claim:

l. Readjustable chair of the kind where the seat and the back are hingeconnected to each other and where these parts are supported on a legsubframe work such that the mutual angular position of the seat and backmay be altered as required, and where rigidly fixed rear and frontsupports on each side of the chair rise from the leg subframe work, saidsupports at the upper end carrying or passing into arm rests, and wherethe back is mounted pivotally on to the rear supports, characterized inthat the seat and front supports are connected via slide shoes fixedlyattached to said seat a predetermined distance from the hinge connectionbetween said seat and back and to said front supports via means forsliding therealong, said slide shoes including means for securingandreleasing the same along said front support, said front supportextending in an upward, forward path from the leg subframe work.

2. Chair according to claim 1, characterized by that a guide is enteredin the connection between the seat and the front supports.

3. A chair according to claim 1 wherein said slide shoes and means forsecuring and releasing the same along said front support comprise meansfor varying friction between said front supports and said shoes and forlocking said supports and said shoes in fixed relation.

1. Readjustable chair of the kind where the seat and the back are hingeconnected to each other and where these parts are supported on a legsubframe work such that the mutual angular position of the seat and backmay be altered as required, and where rigidly fixed rear and frontsupports on each side of the chair rise from the leg subframe work, saidsupports at the upper end carrying or passing into arm rests, and wherethe back is mounted pivotally on to the rear supports, characterized inthat the seat and front supports are connected via slide shoes fixedlyattached to said seat a predetermined distance from the hinge connectionbetween said seat and back and to said front supports via means forsliding therealong, said slide shoes including means for securing andreleasing the same along said front support, said front supportextending in an upward, forward path from the leg subframe work. 2.Chair according to claim 1, characterized by that a guide is entered inthe connection between the seat and the front supports.
 3. A chairaccording to claim 1 wherein said slide shoes and means for securing andreleasing the same along said front support comprise means for varyingfriction between said front supports and said shoes and for locking saidsupports and said shoes in fixed relation.